Home / 91,268.12-126,009.24-81,691.40

Finding the Fourth Proportional to 91,268.12, 126,009.24 and 81,691.40

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Solution

The fourth proportional to 91,268.12, 126,009.24 and 81,691.40 is: 112,787.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,268.12 : 126,009.24 = 81,691.40 : x
  2. Step 2: Convert to fraction form
    91,268.12/126,009.24 = 81,691.40/x
  3. Step 3: Cross multiply
    91,268.12x = 126,009.24 × 81,691.40
  4. Step 4: Simplify right side
    91,268.12x = 10,293,871,228.54
  5. Step 5: Solve for x
    x = 10,293,871,228.54/91,268.12
  6. Step 6: Final answer
    x = 112,787.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.